Introductory Essay -- 1. Otto Neurath and the Neurath Reception: Puzzle and Promise -- I. The Case of Neurath and the History and Historiography of Science and Philosophy -- 2. On Otto Neurath -- 3. History and the System of Science in Otto Neurath -- 4. On the Historiography of Austrian Philosophy -- 5. Aspects of the Social Background and Position of the Vienna Circle at the University of Vienna -- II. Neurath as a Metatheoretician: Epistemology and Methodology -- 6. The Philosopher Otto Neurath -- The Early Neurath -- 7. The First Vienna Circle -- 8. On Neurathโ{128}{153}s Writings on Logic, Ethics and Physics -- 9. The Neurath Principle: Its Grounds and Consequences -- Neurath and the Vienna Circle -- 10. Metaphysics in the Vienna Circle -- 11. Ethics and the Problem of Value in the Vienna Circle -- 12. Otto Neurathโ{128}{148}Moritz Schlick: On the Philosophical and Political Antagonisms in the Vienna Circle -- 13. Neurath contra Schlick. On the Discussion of Truth in the Vienna Circle -- 14. On Neurathโ{128}{153}s Empiricism and his Critique of Empiricism -- 15. Two Ways of Experiential Justification -- Applications -- 16 Otto Neurathโ{128}{153}s Contribution to the Theory of the Social Sciences -- 17. Sociological Thought with Otto Neurath -- 18. Neurathโ{128}{153}s Theory of Pictorial-Statistical Representation -- III. Neurath as Politician of Knowledge: The Partisanship of Enlightenment -- 19. Otto Neurath: Encyclopedist, Adult Educationalist and School Reformer -- 20. Otto Neurath and Adult Education: Unity of Science, Materialism and Comprehensive Enlightenment -- 21. The Unity of Planned Economy and the Unity of Science -- 22. Otto Neurathโ{128}{153}s Utopiasโ{128}{148}The Will to Hope -- Name Index